Yes, ETH can be mined with Geforce 1050 Ti (4GB).

All 1060, 1070, 1070 Ti, 1080, 1080 Ti are hashing more than 1050 Ti. 1080 is not that great for ETH due to memory type so you should avoid that one.

However, 1050 Ti is one of the most efficient cards (MH/s per watt ratio) and cheapest of them all.